Control for apparatus for moving lengths of material



June 10, 1941. A, MQgSlNGER v 2,245,352 coN'rnL Fon APPARATUS FOR MOVING LENGTHS 9F MATERIALv Filed July 13, 1937 2 Sheets-Sheet 1 Patented June l0, v1941 CON TROL`FOR APPARATUS FOR MOVING LENGTHS OF MATERIAL Albert Moessinger, Zurich, Switzerland, assigner` to Tefag Textil-Finanz A, G., Winterthur, Switzerland Appucauon July 1a, 1937, serial No. 153,349 In Switzerland August 1, 1936 8 Claims. (Cl. 'I4-119) The .present invention relates to an apparatus for controlling the motion of lengths of material' for example woven material, particularly in looms for weaving having two stagewise controllable variable speed transmissions. which act on the length of material Iby means of common driven means or power ilow uniting means which may be a differential gear which adds up or subtracts the actions Iof said transmissions.

It is an object of the present invention to provvide an apparatus for controlling the motion of woven fabric, in which apparatus the transmissions for effecting a rough or a ne motion are provided and act with such different speed ratios by means oi a common driven means on the member which controls the motion of the length of fabric, that the range within which the speed may be varied -by means of the transmission which eiects a line adjustment is approximately equal to one stage oi the variable speed gear for the rough adjustment.

Installations'in looms for weaving are known in which the speed of the fabric is changed by ychanging the length oi' a pawl lever. With such devices, the density of the fabric can be changed only within narrow limits; greater changes must be effected by exchanging change wheels which are disposed in between the drive of the fabric and the roller carrying the fabric. Such an exchange of gear wheels takes time and cannot be carried out during the operation of the loom. 'I'he fabric may get greasy or soiled by such an exchange operation.

It has been further proposed to drive the length of material in looms for weaving by means of two variable speed gears with the assistance of a diiierential gear which may -be constructed in the form of a planetary gear. However, the speed ratio at which the two variable speed gears act on the mem-ber which moves the material was not chosenV in such manner that the total speed changing range of one gear was approximately corresponding to one speed changing stage of the other gear, but in the known cases the range of one variable speed gear covered va plurality of speed changing stages of the other gear, whereby the number of eiective speed changing stages was effectively reduced.

An object of the present invention resides in the provision of an apparatus for changing speed of the motion of the fabric in looms for weaving,

said apparatus comprising two variable speed gears and in which apparatus the number of speeds which can be effected is equalto the .product of the number of speed changing stagesl of one gear and that of the other gear.

The speed changing transmission according to this invention may be constructed in the form of a pawl-transmission or as friction transmis-v sion. The diierential gear may -be built in the form of a planetary gear or it may comprise a pawl-transmission by means of which the motions of the speed changing transmission are transmitted with such a time lag to the member driving the fabric that at least a part of the iine motion is added to the rough motion; in such cases, speed adjustment is effected by changing the time lag of the material control motions. The speed changing mechanism according to the present invention may be directly connected with the warp beam or the fabric beam of the textile machine, for example, a loom for weaving, a stitching machine etc. It may also be connected with and/or act on an intermediary or indirect control beam or transporting roller.v The present invention can also be applied to dyeing machines,

' cleaning machines,v paper making and similar machines through which a length of material must be moved at variable speeds.

Further and other objects of the present invention will be hereinafter set forth in the accompanying specication and claims and shown in lthe drawings which, by way of illustration, show what I now consider to -be a preferred embodiment of my invention.

The drawings show three embodiments of the present invention in simplified. diagrammatic manner.

In the drawings:

Fig. 1 illustrates a, diagrammatic layout of a mechanism according to the present invention.

Fig. 2 illustrates .a diagrammatic layout of a modifiedv mechanism according to the present invention.l e

Fig. 3 shows the timing of the motions of members of the mechanism according to Fig. 2 in a diagrammatic manner.

Fig. 4 illustrates a part sectional side view oi a modication of the apparatus according to the present invention. Fig. 4 .is a View from the left into the apparatus shown in Fig. 5 with the right casing wall removed.

Fig. 5 shows a part sectional front View of the apparatus shown in Fig. 4 and with the wall shown on the left of Fig. 4 removed.

Like numerals designate like parts vin all the figures of the drawings.'

Referring more particularly to Fig'. 1 of the drawings: l and 2 are crank discs driven by a loom, which discs act by means of rods 3 and 4 on the swing levers and 6, respectively. The swinging motion of said levers is transmitted by means of pawls 'I and 8, respectively, to the ratchet wheels 9 and I0, respectively, which are keyed to shafts II and I2, respectively. The latter is keyed to a disc I2' which forms the central part of a free wheel coupling comprising rollers 23 and teeth 23' which are .part of tooth wheel I6. Shaft II is keyed to tooth wheel I5.

The fabric is advanced by means of shaft I3 to which tooth wheel Il is keyed. The swinging motion of the levers 5 and 6 is transmitted by means of the ratchet and the tooth wheels I5 and I6 to the control shaft I3. The swinging levers 5 and 6 each comprise a slot in which, by means of threaded members 5" and 6", linkpins I1 and I8 can be moved towards and from the fulcrum of the levers. For more convenient manipulation, members 5" and 6" are provided with handle knobs 5' and 6'. To linie-pins I1 and I8, rods 3 and 4, respectively, are revolvably connected. 'Ihe further the link-pins are removed from the.center of the swinging motion of levers 5 and 6, the less teeth of wheels 9 and I6 are caught by pawls 1 and 8. The more the pins are moved towards the fulcrurn of the levers, the more teeth are caught at each swinging motion.

The two speed changing gears 3, 5, 1, 6 and l, 6, 6, III act on the gear I5, I6, I2', 23, 23 at such different speed ratios that the total range of the gear 3, 5, 1, 6 for the fine motion corresponds approximately to one speed changing stage of the gear I, 6, 6, I6 for the rough motion. Through the variable speed transmission for thc rough adjustment and shaft I2, crank 2 effects a movement to the right of wheel I6 which causes movement to the left oi' tooth wheel Il. Crank I, which causes the fine adjustment, effects, by means 'of the variable speed gear 5, 1, 3 and the shaft II, a motion to the left tooth wheel I5, which causes a right motion of wheel I6, which latter causes a left motion of wheel Il. Cranks I and 2 are so set with respect to one another that wheel I5 causes a clockwise4 motion of wheel I6 only when shaft I2 stands still and pawl 6 moves freely over the teeth of wheel Il. At .this motion, coupling I2'. 23. 23' is disengagedrso that no motion is transmitted backwards to shaft I2. Vice versa. a clockwiseV movement is transmitted to wheel I6 through shaft I2 only when tooth wheel I5 is not driven by means of the speed changing gear 6. 1 9. Thereby, wheel I5 is also moved counterclock wise b v means of wheel I6 which has no other eilect than that wheel 6 moves freely with resnect to pawl 1. The diameters of wheels` I5 and I6 are so chosen that. when moving slide pin I1 fo its full extent. the same change of speed takes place as if pin I6 is moved so far that pawl 6 catches just one tooth more or one i tooth less of wheel I6. The control of the motion of the fabric can thus be changed within each stage of' transmission 6, 8, I0 for the rough adjustment by means of gear 5, 1, 6 for the fine adjustment in many nne stages.

The speed changing apparatus according to Fig. 2 is similarly constructed as that shown in Fig. 1. The loom however drives only disc 2 directly, whereas crank disc I is operated by means of a tooth wheel I6 revolvable about -fulcx'um 20 which is stationary. Fulcrum 2i of disc I is mounted to lever 22 by means of which it can be revolved about fulcrum 20.,

Movement of lever 22 causes change of timing of the swinging motions of lever 60 which corresponds to lever 5 in Fig. 1, with respect to lever 6. With the aid of the free wheel coupling I2', 23, 23', the total movement or a greater or smaller part of the movement of the speed changing transmission 5, 1, 6 for the fine adjustment can be transmitted to shaft I3.

This change of timing of the swinging motions is illustrated in the diag-,ram Fig. 3. In this diagram, the abscissae represent the time Z, for example, in seconds, and the ordinates the amplitudes S of the swinging or the strokes of the levers 60 and 6. Curve 6I represents the motion of lever 66 in the gear for ne adjustment and curve 62 the swinging motion of lever 6 in the gear for rough adjustment, whereby the scales for the distances S are chosen in correspondence with the various transmission ratios according to the diameters of the tooth wheels I5 and I6 yin Fig. 2 so that the ordinates in Fig. 3 are a direct image of advance action of the apparatus on the length of material. The movements of the motions of levers 60 and 6 are displaced with respect to one another by the time p/Z which is one half of the time of one total period of motion p of the length of material. By means of the gear for rough motion, the length of material is moved forwards during the time 1.1/2 for a distance which is represented by H1 in the diagram. From the moment p/2 to the moment p, the gear for the rough movement cannot have any action on the material because, during this time, the pawl runsidle over the teeth of the ratchet. By means of the gear for fine motion, however, the" material is moved for a further distance winch corresponds to the distance designated by h1. During the time p/2, the gear for ne motion has carried out its return motion.

The motions are transmitted differently when the motion of the speed changing gear for the flnemotion takes place at a different time interyal with respect to the motion of the gear for the rough motion, for example, in such manner as is represented by means of curve 63 shown in a dash and dotted line. In this case, for example, the gear for the fine movement begins to act at the moment 'I0 on the length of material and to move the material until the moment 1I. During the time between abscissa 16 and 1I, the iine movement overtakes the still slower rough movement which does not begin to act before the moment p. At the moment 1I, the speed of the rough movement is equal to that of the iine movement according to the equal lnclination of curves 62 and 63 so that the coupling I2', 23, 23 is engaged and from now on transmits the rough movement only to the length of material, whereas the teeth of the gear for the fine movement run freely with respect to their pawl. From moment 1I until moment 3/2p, the gear for the rough movement effects a movement of the length of material which corresponds to the value Ha, whereas, in the previous period 16 to 1I, a motion is made which corresponds to the value h2. The material is, therefore, advanced less than if the movement of the gears were set at an interval of exactly one half period. By further increasing or decreasing the intervals, further changes in the movement of the material can be obtained.

Figs. 4 and 5 show an embodiment of the presplanetary gears.

ent invention having two gears which act on Crank 32 is driven by the loom by means of a sprocket wheel 30 and a shaft 3| and causes a swinging motion of the levers 35 and 36 to which it is connected by means of the rods 33 and 34.- The link-pins 31 and 38, which connect levers 35 and 36 with rods 33 and 34, respectively, carry out a circular movement as indicated by dotted lines 55, 56 about the fulcrums 39 and 40 of the swinging levers 35 and 36.

To the link-pins 31 and 38, respectively, also connecting rods 4l, 42 are linked,y which rods impart a swinging motion to the levers 43 and 44. l

The swinging motion is transmitted to the ratchet wheels 41 and 48 byv means of the pawls 45 and 46. Ratchet wheel 41 is rotatable with respect to shaft 50 and carries two bolts 59, each of which revolvably carries a pair of tooth wheels 49' and 49 which respectively engage a tooth wheel 5| which is rigidly connected to shaft 50 and a tooth wheel 52 which is rigidly connected with the ratchet wheel 48 and supported by a shaft 50. Shafts 50 and 50' are revolvable in casing 64.

Crank 32 imparts great motive impulses to shaft 59 by means of rods 34 and 42`, the swinging lever 44, the pawl 46, the tooth wheel 52, the pairs of tooth wheels 49, and the tooth wheel 5I. A fine movement istransmitted to shaft 59 by means of the rods 33 and 4I, the swinging lever 43, the pawl 45, the ratchet wheel 41, the bolts 59, the pairs of tooth wheels 49, and the tooth wheel 5I; For adjustment of the rough motion and of the ne movement, two spindles 53 and 54 are provided which can be revolved by hand. The lower end of the spindles is threaded and carries nut members 39 and 40' which carry fulcrums 39 and 49. By turning the spindles, the position of the fulcrums 39 and 4U is changed so that the arcs along which the fulcrums 31 and 38 move assume a more or less inclined position with respect to the rods 4I and 42. If the position of the arcs is ments of my invention to be preferred embodiments, I wish it to be understood that I do not desire to be limited to the exact details of design and construction shown and described, for obvious modifications will occur to a person skilled in the art.

What I claim is:

1. A power transmission comprising in combination a plurality of individual power transmitting means arranged in `parallel with respect to the flow of power, power iiow uniting means connected with and operatively inter-connecting said individual transmitting means, said power ow uniting means comprising speed changing means individually associated with and driven by V said individual power transmitting means and having individually different speed changing ra.- tios, and adjustable power apportioning means connected with one of said indivdual transmitting means and being adapted to adjustably control the amount of power flowing through the means with which it is connected to said power flow unitapproximately perpendicular to the rods 4 I and 42 as is, for example, arc 55, a small movement only is imparted to lever 44. If the arc is inclined with respect to the rod as is, for example, arc 56, the movement imparted to levers 44 or 43 is greater and consequently the speed of shaft 50.

The position of the axial bearings 58 of the spindles 53 and 54 can be changed individually or jointly by individually or jointly moving said bearings in axial direction by revolving levers 51 manually or by means of an automatic governor. Lever 51 carries a pin which engages an annular groove in the slide member 58. Upon movement y of lever 51 about its fulcrum 51', slide member 58' is moved axially in casing 64 and takes with slots 69 and 10, respectively. The position of the By these means, an adjustment can free ends of members and 66 which project ing means while said mechanism is in operation.

2. A power transmission comprising in combination a plurality of individual, stepwise acting power transmitting means arrangedv in parallel with respect to the fiow of power, power flow uniting means connected with and operatively interconnecting said individual 'transmitting means, and adjustable power apportioning means individually connected with said individual transmitting means and being adapted to individually adjustably control the extent of the stepwise actions of said transmitting means while said mechanism is in operation, said power uniting means comprising speed changing means connected with one of said power transmitting meansv and having such speed` transmitting means which are arranged in par-` allel with respect to the flow of power therethrough and which interconnect said crank and said gear, individual stroke adjusting means individually connected with said power transmitting means and being adapted to beindividually adjusted while said transmission is in operation whereby the driving action of said individual transmitting means on said differential gear may be changed individually. l

4. A power transmission comprising a plurality of power transmitting means, a differential gear operatively connected with and driven by said speed changing means, each of said power transmitting means comprising a crank, connecting means connected to said crank and comprising a plurality of members movably linked together by means of hinge means, adjustable vguide means connected with said hinge means and guiding and adjusting the extent and direction of the movements of said hinge means and of said connecting means and, thereby, the action of said power transmitting means on said differential gear. f

5. A power transmission comprising a plurality of power transmitting means, a differential gear operatively connected with and driven by said power transmitting means, each of said power transmitting means comprising a crank, a connecting member movably connected to said crank,

another connecting member, a hinge means movably connecting both said connecting memberse a lever carrying a ratchet pawl and being linked to theI tree end oi said other connecting member and being swingable about the central axis o! rotation of said diierential gear. said differential gear comprising a ratchet wheel which is adapted to be actuated by said ratchet pawl, a link lever being swingable about a displaceable iulcrum and supporting and guiding said hinge member and, upon displacement or said fulcrum. changing the path of said hinge member and, thereby, also changing the speed of said other connecting member acting on said ratchet lever and the rate of drive of said ratchet wheel and diierential gear. l

6. A power transmission comprising a plurality of intermittently substantially reciprocatingly acting driving means, speed changing means having diiierent speed changing ratios individually connected with said driving means. a common driven means operatively connected with and driven by said speed changing means, and speed xadjusting means individually connected with said ing means with which it is connected and said dierential gear, another speed changing means operatively connected with and driven by another of said driving means and being disposed intermediary said driving means with which it is connected and said differential gear and having a. speed changing ratio which is permanently different from the speed changing ratio of said rst mentioned speed changing means and which changes the speed at one step at a rate which is substantially equal to the total speed changing range ot the other of said speed changing means. 8. A power drive particularly for the drive of the breast beam in looms for weaving, comprising two individual power transmissions. a common speed changing gearing connected with and operated by both said power transmissions. said power transmissions being of the ratchet type and individually comprising pawls. reciprocatingly operated pawl drive means connected with and operating said pawls, ratchet wheels indi- 'vidually connected with and forming part of and being operatively interconnected by said gearing and alternately individually actuated by said pawis, timing means connected with said drive means and timing the operation or said pawls and 'actuation of said ratchet wheels and adding action oi.' one of said transmissions on said gearing to the action of the other of said transmissions on said gearing in a predetermined proportion.

ALBERT MOESSINGER. 

